数学定理英文版

更新时间:2023-05-15 17:10:51 阅读：评论：0

General:

Reflexive Property	A quantity is congruent (equal) to itlf. a = a
Symmetric Property	If a = b, then b = a.
Transitive Property	If a = b and b = c, then a = c.
Addition Postulate	If equal quantities are added to equal quantities, the sums are equal.
Subtraction Postulate	If equal quantities are subtracted from equal quantities, the differences are equal.
Multiplication Postulate	If equal quantities are multiplied by equal quantities, the products are equal. (also Doubles of equal quantities are equal.)
Division Postulate	平面设计班 If equal quantities are divided by equal nonzero quantities, the quotients are equal. (also Halves of equal quantities are equal.)
Substitution Postulate	A quantity may be substituted for its equal in any expression.
Partition Postulate	The whole is equal to the sum of its parts. Also: Betweeness of Points: AB + BC = AC Angle Addition Postulate: m<ABC + m<CBD = m<ABD
ruleoutConstruction	Two points determine a straight line.
Construction	From a given point on (or not on) a line, one and only one perpendicular can be drawn to the line.

Angles:

Right Angles	All right angles are congruent.
Straight Angles	All straight angles are congruent.
Congruent Supplements	Supplements of the same angle, or congruent angles, are congruent.
Congruent Complements	Complements of the same angle, or congruent angles, are congruent.
Linear Pair	If two angles form a linear pair, they are supplementary. recreational
Vertical Angles	Vertical angles are congruent.
Triangle Sum	The sum of the interior angles of a triangle is 180?
Exterior Angle	The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles. The measure of an exterior angle of a triangle is greater than either non-adjacent interior angle.
Ba Angle Theorem (Isosceles Triangle)	If two sides of a triangle are congruent, the angles opposite the sides are congruent.
Ba Angle Conver (Isosceles Triangle)	If two angles of a triangle are congruent, the sides opposite the angles are congruent.

Triangles:

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Side-Side-Side (SSS) Congruence	If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent.
Side-Angle-Side (SAS) Congruence	If two sides and the included angle of one triangle are congruent to the corresponding parts of another triangle, the triangles are congruent.
Angle-Side-Angle (ASA) Congruence	If two angles and the included side of one triangle are congruent to the corresponding parts of another triangle, the triangles are congruent.
Angle-Angle-Side (AAS) Congruence	If two angles and the non-included side of one triangle are congruent to the corresponding parts of another triangle, the triangles are congruent.
Hypotenu-Leg (HL奥斯卡经典励志电影) Congruence (right triangle)	If the hypotenu and leg of one right triangle are congruent to the corresponding parts of another right triangle, the two right triangles are congruent.
CPCTC	Corresponding parts of congruent triangles are congruent.
Angle-Angle (厦门电脑培训AA) Similarity	If two angles of one triangle are congruent to two angles of another triangle, the triangles are similar.
SSS for Similarity	If the three ts of corresponding sides of two triangles are in proportion, the triangles are similar.
SAS for Similarity	If an angle of one triangle is congruent to the corresponding angle of another triangle and the lengths of the sides including the angles are in proportion, the triangles are similar.
Side Proportionality	If two triangles are similar, the corresponding sides are in proportion.
Mid-gment Theorem (also called mid-line)	The gment connecting the midpoints of two sides of a triangle is parallelto the third side and is half as long.
Sum of Two Sides	The sum of the lengths of any two sides of a triangle must be greater than the third side
Longest Side	In a triangle, the longest side is across from the largest angle. In a triangle, the largest angle is across from the longest side.
Altitude Rule	The altitude to the hypotenu of a right triangle is the mean proportional between the gments into which it divides the hypotenu.
Leg Rule	Each leg of a right triangle is the mean proportional between the hypotenu and the projection of the leg on the hypotenu.

Parallels:

Corresponding Angles	If two parallel lines are cut by a transversal, then the pairs of corresponding angles are congruent.
Corresponding Angles Conver	If two lines are cut by a transversal and the corresponding angles are congruent, the lines are parallel.
Alternate Interior Angles	If two parallellines are cut by a transversal, then the alternate interior angles are congruent.
Alternate Exterior Angles	If twoparallel lines are cut by a transversal, then the alternate exterior angles are congruent.
Interiors on Same Side	If two parallelbleach什么意思 lines are cut by a transversal, the interior angles on the same side of the transversal are supplementary.
Alternate Interior Angles Conver	If two lines are cut by a transversal and the alternate interior angles are congruent, the lines are parallel.
Alternate Exterior Anglesstupid是什么意思 Conver	If two lines are cut by a transversal and the alternate exterior angles are congruent, the lines are parallel.
Interiors on Same Side Conver	If two lines are cut by a transversal and the interior angles on the same side of the transversal are supplementary, the lines are parallel.

Quadrilaterals:

Parallelograms	About Sides	If a quadrilateral is a parallelogram, the opposite sides are parallel. If a quadrilateral is a parallelogram, the opposite sides are congruent.
	About Angles	If a quadrilateral is a parallelogram, the opposite angles are congruent. If a quadrilateral is a parallelogram, the concutive angles are supplementary.
	About Diagonals	If a quadrilateral is a parallelogram, the diagonals bict each other. If a quadrilateral is a parallelogram, the diagonals form two congruent triangles.
Parallelogram Convers	About Sides	If both pairs of opposite sides of a quadrilateral are parallel, the quadrilateral is a parallelogram. If both pairs of opposite sides of a quadrilateral are congruent, the quadrilateral is a parallelogram.
	About Angles	If both pairs of opposite angles of a quadrilateral are congruent, the quadrilateral is a parallelogram. If the concutive angles of a quadrilateral are supplementary, the quadrilateral is a parallelogram.
	About Diagonals	If the diagonals of a quadrilateral bict each other, the quadrilateral is a parallelogram. If the diagonals of a quadrilateral form two congruent triangles, the quadrilateral is a parallelogram.
富丽堂皇英文Parallelogram	If one pair of sides of a quadrilateral is BOTH parallel and congruent, the quadrilateral is a parallelogram.
Rectangle	If a parallelogram has one right angle it is a rectangle
	A parallelogram is a rectangle if and only if its diagonals are congruent.
	A rectangle is a parallelogram with four right angles.
Rhombus	A rhombus is a parallelogram with four congruent sides.
	If a parallelogram has two concutive sides congruent, it is a rhombus.
	A parallelogram is a rhombus if and only if each diagonal bicts a pair of opposite angles.
	A parallelogram is a rhombus if and only if the diagonals are perpendicular.
Square	A square is a parallelogram with four congruent sides and four right angles.
	A quadrilateral is a square if and only if it is a rhombus and a rectangle.
Trapezoid	A trapezoid is a quadrilateral with exactly one pair of parallel sides.
Isosceles Trapezoid	An isosceles trapezoid is a trapezoid with congruent legs.
	A trapezoid is isosceles if and only if the ba angles are congruent
	A trapezoid is isosceles if and only if the diagonals are congruent man to man
	If a trapezoid is isosceles, the opposite angles are supplementary.